<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator="/">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>用户管理</el-breadcrumb-item>
            <el-breadcrumb-item>用户列表</el-breadcrumb-item>
        </el-breadcrumb>

        <!-- 卡片视图区域-->
        <el-card class="box-card">
            <!-- 搜索与添加区域 -->
            <el-row :gutter="20">
                <el-col :span="8">
                    <el-input placeholder="请输入内容" v-model="queryInfo.query" clearable @clear="getUserList">
                        <el-button slot="append" icon="el-icon-search" @click="getUserList"></el-button>
                    </el-input>
                </el-col>
                <el-col :span="4"> 
                    <el-button type="primary" @click="addDialogVisible = true">添加用户</el-button>
                </el-col>
            </el-row>

            <!-- 用户列表区域 -->
            <el-table :data="userlist" border stripe>
                <el-table-column label="#" type="index" class="index"></el-table-column>
                <el-table-column label="姓名" prop="username"></el-table-column>
                <el-table-column label="邮箱" prop="email"></el-table-column>
                <el-table-column label="电话" prop="mobile"></el-table-column>
                <el-table-column label="角色" prop="role_name"></el-table-column>
                <el-table-column label="状态" prop="mg_state">
                    <!-- 定义作用域插槽 -->
                    <template slot-scope="scope" >
                        <!-- {{scope.row}} -->
                        <el-switch v-model="scope.row.mg_state" @change="userStateChanged(scope.row)">
                        </el-switch>
                    </template>
                </el-table-column>
                <el-table-column label="操作" width="180px">
                    <template slot-scope="scope">
                        <!-- {{scope}} -->
                        <!-- 修改按钮 -->
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(scope.row.id)"></el-button>
                        <!-- 删除按钮 -->
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeUserById(scope.row.id)"></el-button>
                        <!-- 分配角色按钮 -->
                        <el-tooltip effect="dark" content="分配角色" placement="top" :enterable="false">
                            <el-button type="warning" icon="el-icon-setting" size="mini" @click="setRole(scope.row)"></el-button>
                        </el-tooltip>
                    </template>
                </el-table-column>
            </el-table>

            <!-- 分页区域 -->
            <el-pagination @size-change="handleSizeChange" @current-change="handleCurrentChange" :current-page="queryInfo.pagenum" :page-sizes="[1, 2, 5, 10]" :page-size="queryInfo.pagesize" layout="total, sizes, prev, pager, next, jumper" :total="total">
            </el-pagination>
        </el-card>

        <!-- 添加用户的对话框 -->
        <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
            <!-- 内容主体区域 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="70px">
                <!-- 用户名 -->
                <el-form-item label="用户名" prop="username">
                    <el-input v-model="addForm.username"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item label="密码" prop="password">
                    <el-input v-model="addForm.password"></el-input>
                </el-form-item>
                <!-- 邮箱 -->
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="addForm.email"></el-input>
                </el-form-item>
                <!-- 手机 -->
                <el-form-item label="手机" prop="mobile">
                    <el-input v-model="addForm.mobile"></el-input>
                </el-form-item>
            </el-form>
                
            <!-- 底部区域 -->
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="addUser">确 定</el-button>
            </span>
        </el-dialog>
        
        <!-- 修改用户的对话框 -->
        <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
            <el-form :model="editFrom" :rules="editFromRules" ref="editFromRef" label-width="70px">
                <!-- 用户名 -->
                <el-form-item label="用户名">
                    <el-input v-model="editFrom.username" disabled></el-input>
                </el-form-item>
                <!-- 邮箱 -->
                <el-form-item label="邮箱" prop="email">
                    <el-input v-model="editFrom.email"></el-input>
                </el-form-item>
                <!-- 电话 -->
                <el-form-item label="手机号" prop="mobile">
                    <el-input v-model="editFrom.mobile"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="editUserInfo">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 分配角色的对话框 -->
        <el-dialog title="分配角色" :visible.sync="setRoleDialogVisible" width="50%" @close="setRoleDialogClosed">
            <div>
                <p>当前的用户: {{userInfo.username}}</p>
                <p>当前的角色: {{userInfo.role_name}}</p>
                <p>
                    分配新角色:
                    <el-select v-model="selectedRolesId" placeholder="请选择">
                        <el-option v-for="item in rolesList" :key="item.id" :label="item.roleName" :value="item.id"></el-option>
                    </el-select>
                </p>
            </div>
            <span slot="footer" class="dialog-footer">
                <el-button @click="setRoleDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="saveRoleInfo">确 定</el-button>
            </span>
        </el-dialog>
    </div>
</template>

<script>
export default {
    data() {
            // 验证邮箱的规则
            var checkEmail = (rule, value, cb) => {
                // 验证邮箱的正则表达式
                const regEmail = /^([a-zA-Z0-9_-])+@([a-zA-Z0-9_-])+(\.[a-zA-Z0-9_-])+/;

                if(regEmail.test(value)) {
                    return cb();
                }

                cb(new Error('请输入合法的邮箱'));
            };

            // 验证手机的规则
            var checkMobile = (rule, value, cb) => {
                // 验证手机号的正则表达式
                const regMobile = /^(0|86|17951)?(13[0-9]|15[012356789]|17[678]|18[0-9]|14[57])[0-9]{8}$/;

                if(regMobile.test(value)) {
                    return cb();
                }
                
                cb(new Error('请输入合法的手机号'))
            };

        return{
            // 获取用户列表的参数对象
            queryInfo: {
                query: '',
                pagenum: 1, //当前的页数
                pagesize: 2 //当前每页显示多少条数据
            },
            userlist: [],
            total: 0,
            // 控制添加用户对话框得显示与隐藏
            addDialogVisible: false,
            // 添加用户的表单数据
            addForm: {
                username: '',
                password: '',
                email: '',
                mobile: ''
            },
            // 添加表单验证规则对象
            addFormRules: {
                username: [
                    { required: true, message: '请输入用户名', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3~10 个字符', trigger: 'blur' }
                ],
                password: [
                    { required: true, message: '请输入密码', trigger: 'blur' },
                    { min: 6, max: 15, message: '长度在 6~15 个字符', trigger: 'blur' }
                ],
                email: [
                    { required: true, message: '请输入邮箱', trigger: 'blur' },
                    { validator: checkEmail, trigger: 'blur'}
                ],
                mobile: [
                    { required: true, message: '请输入手机', trigger: 'blur' },
                    { validator: checkMobile, trigger: 'blur' }
                ]
            },
            // 控制修改用户的对话框
            editDialogVisible: false,
            // 查询到的用户信息对象
            editFrom: {},
            // 修改表单的验证规则对象
            editFromRules: {
                email: [
                    { required: true, message: '请输入邮箱', trigger: 'blur' },
                    { validator: checkEmail, trigger: 'blur' }
                ],
                mobile: [
                    { required: true, message: '请输入手机', trigger: 'blur' },
                    { validator: checkMobile, trigger: 'blur' }
                ]
            },
            // 控制分配角色对话框的显示与隐藏
            setRoleDialogVisible: false,
            // 需要被分配角色的用户信息
            userInfo: {},
            // 所有角色的数据列表
            rolesList: [],
            // 已经选择角色的Id值
            selectedRolesId: ''
        }
    },
    created() {
        this.getUserList();
    },
    methods: {
        async getUserList() {
            const { data: res } = await this.$http.get('users', { params: this.queryInfo });
            console.log(res);
            if(res.meta.status !== 200) {
                return this.$message.error('获取用户列表失败！');
            }
            this.userlist = res.data.users;
            this.total = res.data.total;
        },
        // 监听 pagesize 事件
        handleSizeChange(newSize) {
            // console.log(newSize);
            this.queryInfo.pagesize = newSize;
            this.getUserList();
        },
        // 监听页码改变的事件
        handleCurrentChange(newPage) {
            // console.log(newPage);
            this.queryInfo.pagenum = newPage;
            this.getUserList();
        },
        // 监听 switch 开关的状态
        async userStateChanged(userinfo) { 
            const{ data: res } = await this.$http.put(`users/${userinfo.id}/state/${userinfo.mg_state}`);
            if(res.meta.status !== 200) {
                userinfo.mg_state = !userinfo.mg_state;
                return this.$message.error('更新用户状态失败！');
            }
            this.$message.success('更新用户状态成功！');
        },
        // 监听添加用户对话框的关闭事件
        addDialogClosed() {
            this.$refs.addFormRef.resetFields();
        },
        // 点击按钮，添加新用户
        addUser() {
            // 对用户信息进行校验
            this.$refs.addFormRef.validate(async valid => {
                if (!valid) return  this.$message.error('用户信息验证失败！');
                const { data: res } =  await this.$http.post('users', this.addForm);
                if (res.meta.status !== 201) {
                    this.$message.error('添加用户失败！');
                }
                
                this.$message.success('添加用户成功！');
                // 隐藏添加用户的对话框
                this.addDialogVisible = false;
                // 重新获取用户列表
                this.getUserList();
            }); 
        },
        // 展示编辑用户信息的对话框
        async showEditDialog(id) {
            const { data: res } = await this.$http.get('users/' + id);
            if (res.meta.status !== 200 ) {
                return this.$message.error('查询用户信息失败！');
            }

            this.editFrom = res.data;
            this.editDialogVisible = true;
            // console.log(id);
        },
        // 监听编辑用户信息对话框的关闭事件
        editDialogClosed() {
            // 清除表单内容
            this.$refs.editFromRef.resetFields();
        },
        // 修改用户信息并提交
        editUserInfo() {
            this.$refs.editFromRef.validate(async valid =>  {
                if(!valid) return this.$message.error('用户信息验证失败!');
                const { data: res } = await this.$http.put('users/' + this.editFrom.id, {
                    email: this.editFrom.email,
                    mobile: this.editFrom.mobile
                });

                if(res.meta.status !== 200) {
                    return this.$message.error('更新用户信息失败!');
                }

                this.$message.success('更新用户状态成功！');
                // 关闭对话框
                this.editDialogVisible = false;
                // 刷新数据列表
                this.getUserList();
            });
        },
        // 根据id删除对应的用户信息
        async removeUserById(id) {
            // 弹出弹框提示
            const confirmResult =  await this.$confirm('此操作将永久删除该用户, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning'
            }).catch(err => { //catch捕获错误
                return err;
            });

            // 如果点击确认删除则返回为 confirm, 取消删除则返回 cancel
            if (confirmResult !== 'confirm') {
                return this.$message.info('已取消删除！');
            }
            
            const {data: res} = await this.$http.delete('users/' + id);
            if (res.meta.status !== 200) {
                return this.$message.error('删除用户失败！');
            }

            this.$message.success('删除用户成功！');
            // 刷新列表数据
            this.getUserList();
        },
        // 展示分配角色的对话框
        async setRole(userInfo) {
            this.userInfo = userInfo;
            // 获取所有角色的列表
            const { data: res } = await this.$http.get('roles');
            if (res.meta.status !== 200) {
                return this.$message.error('获取角色列表失败！');
            }
            this.rolesList = res.data;

            this.setRoleDialogVisible = true;
        },
        // 点击按钮,分配角色
        async saveRoleInfo() {
            if (!this.selectedRolesId) {
                return this.$message.error('请选择选择要分配的角色!');
            }

            // 发送请求
            const { data: res } = await this.$http.put(`users/${this.userInfo.id}/role`, {
                rid: this.selectedRolesId
            });
            if (res.meta.status !== 200) {
                return this.$message.error('更新角色信息失败!');
            }
            this.$message.success('更新角色信息成功!');

            // 刷新用户信息列表
            this.getUserList();
            // 关闭对话框
            this.setRoleDialogVisible = false;
        },
        // 监听设置用户角色信息的关闭事件
        setRoleDialogClosed() {
            this.selectedRolesId = '',
            this.userInfo = {}
        }
    }
}
</script>

<style>

</style>
